如何检查模板工具包中的变量类型？

function greet(name: string): string {
    return `Hello, ${name}!`;
}

def greet(name):
    if not isinstance(name, str):
        raise TypeError("name must be a string")
    return f"Hello, {name}!"

from jinja2 import Template, Environment, FileSystemLoader

# 加载模板文件
env = Environment(loader=FileSystemLoader('templates'))
template = env.get_template('example.html')

def render_template(data):
    # 检查变量类型
    if not isinstance(data['name'], str):
        raise TypeError("name must be a string")
    if not isinstance(data['age'], int):
        raise TypeError("age must be an integer")
    
    return template.render(data)

# 示例数据
data = {
    'name': 'Alice',
    'age': 30
}

try:
    rendered_html = render_template(data)
    print(rendered_html)
except TypeError as e:
    print(f"Error: {e}")